换热器管束流体诱导振动机理与防振研究进展

Research progress in the flow induced vibration mechanism of tube bundles in heat exchangers and precautionary measures

换热器内管束的流体诱导振动所产生的危害严重影响其运行的安全性。本文对近年来国内外学者对管束振动机理的研究现状进行了综述,说明由于振动损坏,传热管的平均服役寿命仅达到设计寿命的一半,同时系统总结并提出了防振措施。阐述了随着换热器的设计趋于大型化和壳程流动高速度化,对换热器内流体诱导振动问题的正确分析,成为延长换热器服役寿命的关键因素之一。指出了未来研究应重点关注换热管束的激振原因,提出了更有效的防护措施,对实际换热器设计具有一定的指导意义。

The flow-induced vibration of tube bundles in heat exchangers seriously affects the operation safety.This paper presents the research progress in the field of vibration mechanism of tube bundles in recent years.Due to vibration damage,the average service life of heat transfer tube is only half of its design life.Based on the systematic analysis,the corresponding anti-vibration measures are proposed.As the design trend of heat exchanger is to get large-scale and high-spead shell-side flow the flow-induced vibration of tube bundles stands out as one of the decisive factors to extend the service life of heat exchanger.This paper pointed out that the future research should be focused on the reason of flow-induced vibration of tube bundles,and the more effective protective measures should be proposed,which is of some significance to the actual design of heat exchanger.